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Table 4 Two-sided Wilcoxon signed rank test results of the plot size effect on LiDAR metrics for the Sierra Nevada Mountains study site

From: Impact of data model and point density on aboveground forest biomass estimation from airborne LiDAR

Sierra Nevada Mountains, California
Point density (points m−2) Plot size (ha) AUCW CV FC Max-H MeanH P25H P50H P75H P90H StdH
E-B CHM E-B CHM E-B CHM E-B CHM E-B CHM E-B CHM E-B CHM E-B CHM E-B CHM E-B CHM
Original 0.09–0.25
0.09–0.50
0.09–1.00
10 points 0.09–0.25
0.09–0.50
0.09–1.00
5 points 0.09–0.25
0.09–0.50
0.09–1.00
1 points 0.09–0.25
0.09–0.50
0.09–1.00
  1. The reference plot size for the comparison was that used for the field plot measurements (0.09 ha)
  2. – indicates no significant differences, indicates significant differences (significance level: 5%), E-B echo-based data model, CHM canopy height model, AUCW area under canopy waveform, CV coefficient of variation, FC fractional cover, Max-H maximum canopy height, Mean-H mean canopy height, P25H 25th height percentile, P50H 50th height percentile (median height), P75H 75th height percentile, P90H 90th height percentile, StdH standard deviation of the height